[TowerTalk] Stacking question - another reality data

[GMuller885 at aol.com]

Some help please.
  I have a Rohn 36 foot tower. On it I have a Hazer with a 10 foot  mast 
and Ham 4 rotator.  I have my modest beam six feet up the mast. I  would like 
to put a 6 meter 4 element beam on this tower. Which beam should be  on top 
and what is the spacing given my limitations? Any and all help is greatly  
appreciated.
 
Gerald Muller K9GEM
GMuller885 at aol.com  

 
In a message dated 8/19/2016 11:33:09 A.M. Central Daylight Time,  
jim.thom at telus.net writes:

Date:  Tue, 9 Aug 2016 21:06:54 -0400
From: "Tim Duffy"  <k3lr at k3lr.com>
To: <k1ttt at arrl.net>,  <towertalk at contesting.com>
Subject: Re: [TowerTalk] Stacking question  - another reality data
point

I have 41 years experience in stacking  2, 3 and 4 Yagi's high.
After many hours behind the HFTA and NEC model  engines - then putting 
Yagi's
up in the air and using them for many years  here at K3LR - these are the
stacking distances that have worked very well  at this Western PA QTH:

Lowest Yagi height:
40 meters - 118  feet
20 meters - 50 feet
15 meters - 40 feet
10 meters - 33  feet

Then - stacking distances by band:
40 meters - 72 feet
20  meters - 60 feet
15 meters - 40 feet
10 meters - 33 feet

All OWA  Yagi's on all bands at K3LR have booms that are 48 feet long (it
makes a  difference).

73,
Tim K3LR

## How did the 118 ft for the  lowest height for 40m  come about ?  That 
and the
72 ft stacking  distance on 40M ?   That would put the upper 40m at  190 
ft.  
72 ft  spacing on 40m is like 36 ft spacing on 20m. 

##   I would have thought that a 95 / 190 stack on 40m....with 95 ft 
spacing   would
have been the ticket. 

Jim   VE7RF

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